水/Triton X-100/正丁醇/环己烷反相微乳液体系中水结构的FT-IR研究  

Study on the Microstructural Characteristics of Water in Water/Triton X-100/n-Butanol/Cyclohexane Microemulsion by FT-IR Spectroscopy

作　　者：彭旭红[1] 方建[1] 王宏奎[1] 赵继华[1] 沈伟国[1,2] 

机构地区：[1]兰州大学化学化工学院,兰州730000 [2]毕东理工大学化学学院,上海200237

出　　处：《化学学报》2011年第19期2253-2258,共6页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.20603014,20973061);上海市科委纳米技术专项基金(Nos.0652nm010,08jc1408100)资助项目

摘　　要：用FT-IR法研究了水/辛烷基苯酚聚氧乙烯醚(Triton X-100)/正丁醇/环己烷组成的反相微乳液体系水池中存在的束缚、结合和自由3种不同的水的状态.分别考察了水与表面活性剂物质的量之比(Rw)、水油比φ(水与环己烷的质量比)、助剂正丁醇的含量对3种状态水含量的影响.发现在φ=2.8、m正丁醇/mTriton X-100=0.5、Rw=8时反相微乳液中出现自由水,形成水池;然后每个表面活性剂分子所含的结合水的数目稳定在2,束缚水和自由水的数目随Rw增加而增加;当Rw=20、m正丁醇/mTriton X-100=0.5时,φ从1增加到6.7的范围内,环己烷的多少对反相微乳液体系的红外光谱基本上没有影响;正丁醇与Triton X-100分子的烷基链、水分别发生作用,制约了自由水的出现.The states of water in water/Triton X-100/n-butanol/cyclohexane reverse microemulsion,trapped water,bound water and free water,have been studied at various molar ratio of water to Triton X-100,mass ratio of water to oil（） and the content of n-butanol by means of Fourier transform infrared spectroscopy（FT-IR）.It was found that the water pools formed after Rw being larger than 8 as was 2.8 and mn-butanol/mTriton X-100 was 0.5;and the number of free water,the trapped water of per Triton X-100 molecule increased with Rw,while the number of the bounded water was almost constant at 2;the mass ratio of water to oil（1～6.7） had little effect on the FT-IR spectroscopy of the reverse microemulsion at Rw of 20 and mn-butanol/mTriton X-100 of 0.5.In addition,the n-butanol molecules interacted with both molecules of Triton X-100 and water,and it retarded the formation of free water.

关 键 词：反相微乳液 红外光谱 水的状态 TRITON X-100 正丁醇 

分 类 号：O648.23[理学—物理化学]